From mboxrd@z Thu Jan  1 00:00:00 1970
X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me
X-Spam-Level: 
X-Spam-Status: No, score=-1.3 required=5.0 tests=BAYES_00,INVALID_MSGID
	autolearn=no autolearn_force=no version=3.4.4
X-Google-Language: ENGLISH,ASCII-7-bit
X-Google-Thread: 103376,7844279822ce7c28
X-Google-Attributes: gid103376,public
From: Florian Weimer <fw@s.netic.de>
Subject: Re: Newbie question : types , representation
Date: 1999/08/27
Message-ID: <87vha1lyiz.fsf@deneb.cygnus.qad.org>#1/1
X-Deja-AN: 517996086
References: <37C621F3.C6C0DC3A@acenet.com.au>
 <5oAx3.5359$W5.510061@typhoon-sf.snfc21.pbi.net>
Content-Type: text/plain; charset=us-ascii
X-Complaints-To: fw@s.netic.de
X-Trace: deneb.cygnus.qad.org 935788276 2482 192.168.1.2 (27 Aug 1999 21:11:16
 GMT)
Organization: Penguin on board
Mime-Version: 1.0
User-Agent: Gnus/5.070095 (Pterodactyl Gnus v0.95) Emacs/20.4
NNTP-Posting-Date: 27 Aug 1999 21:11:16 GMT
Newsgroups: comp.lang.ada
Date: 1999-08-27T21:11:16+00:00
List-Id: <comp.lang.ada>

tmoran@bix.com writes:

>    From_Base64 : array(Base64, Base64, Base64, Base64) of Byte_Triple;

> On my P200, this sort of thing executes at a rate of about 6 Base64
> characters, or 4 Byte's, converted each microsecond.  Using a
> modern fast CPU you would approach being I/O bound.

You are kidding, aren't you?

From_Base64 is an array which is at least 48 MB in size.  If you're
encoding a compressed binary file, there will be a lot of cache misses,
which are terribly expensive.  And by the time the array has been
initialized, other methods will already have finished the conversion.